Today's Message Index:
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1. 12:25 AM - Re: Re: AN42B eye bolt for hinges (Clif Dawson)
2. 07:29 AM - Re: AN42B eye bolt for hinges (PoconoJohn2)
3. 07:40 AM - Re: Re: AN42B eye bolt for hinges (Kip Gardner)
4. 07:41 AM - Re: Rib to Spar fit (PoconoJohn2)
5. 07:54 AM - Re: Re: AN42B eye bolt for hinges (John Franklin)
6. 08:14 AM - Re: AN42B eye bolt for hinges (PoconoJohn2)
7. 12:21 PM - Re: Re: AN42B eye bolt for hinges (John Franklin)
8. 04:45 PM - Re: Re: AN42B eye bolt for hinges (Glen Schweizer)
9. 09:00 PM - Re: Re: AN42B eye bolt for hinges (Clif Dawson)
10. 09:01 PM - Re: Re: AN42B eye bolt for hinges (Clif Dawson)
Message 1
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| Subject: | Re: AN42B eye bolt for hinges |
It appears you're both right. Your just looking at two different aspects.
The first question I see as referring to the eyebolts themselves, mounting
them in the tailparts. No rotation there. The second is the hinge pin which
is in a rotational situation. There you need castle and cotter. Or, as I
have
done, albeit with the traditional welded hinges, use a clevis pin. Saves a
little weight in the tail which is heavy already. The issue I see with the
eyebolts is that the forces are not centered on the hinge pin which will
cause extra wear on the pin or bolt. There will be a bending force on all
the parts. Also the stab and elevator will be further apart, larger gap,
than the per plans hinges. Yes, I know, more finiky work but you only
do it once. I look back on it with satisfaction in the experience.
Clif
How difficult it is to be simple. (Vincent van Gogh)
> Oscar,
>
> But one of the two eyebolts will be rotating about the AN3 bolt, right?
> However I'm not an expert on AC43-13. Another confusing subject for me is
> when to use the dimpled AN bolts that are designated for shear situations.
>
> John F.
Message 2
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| Subject: | Re: AN42B eye bolt for hinges |
It would look like this. The photo (not sure who is building that) doesn't show
the 1/8" piece of wood which may account for the amount of "grip" area showing
on the bolt. I believe a large elastic stop nut will suffice. The washer can't
be too large since two are next to each other. I need the clevis with pin.
John C
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=495544#495544
Attachments:
http://forums.matronics.com//files/img_1030_122.jpg
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| Subject: | Re: AN42B eye bolt for hinges |
I would say that will work ok as long as you do something to assure that the eyebolts
never rotate, and you do something to reduce the gap between the elevator
and the stabilizer.
Kip Gardner
> On Apr 2, 2020, at 10:28 AM, PoconoJohn2 <redroof@protonmail.com> wrote:
>
>
> It would look like this. The photo (not sure who is building that) doesn't show
the 1/8" piece of wood which may account for the amount of "grip" area showing
on the bolt. I believe a large elastic stop nut will suffice. The washer can't
be too large since two are next to each other. I need the clevis with pin.
>
> John C
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=495544#495544
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/img_1030_122.jpg
>
>
>
>
>
>
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| Subject: | Re: Rib to Spar fit |
1"
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=495547#495547
Message 5
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| Subject: | Re: AN42B eye bolt for hinges |
John,
I'm not sure why you need two eyebolts on one side, is that what the plans call
for? On mine I counterbored the wood so the eyebolts sits flush and also narrows
the gap a bit. And yes I agree that nylon locknuts are appropriate on the
eyebolts with clevis/cotter pins for the rotating hinge.
Those clevis pins are also used to attach turnbuckle forks to the control horns,
so buy plenty of various lengths. They're fairly cheap (for aircraft hardware!).
Regards,
John F.
-----Original Message-----
>From: PoconoJohn2 <redroof@protonmail.com>
>Sent: Apr 2, 2020 9:28 AM
>To: pietenpol-list@matronics.com
>Subject: Pietenpol-List: Re: AN42B eye bolt for hinges
>
>
>It would look like this. The photo (not sure who is building that) doesn't show
the 1/8" piece of wood which may account for the amount of "grip" area showing
on the bolt. I believe a large elastic stop nut will suffice. The washer can't
be too large since two are next to each other. I need the clevis with pin.
>
>John C
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=495544#495544
>
>
>Attachments:
>
>http://forums.matronics.com//files/img_1030_122.jpg
>
>
Message 6
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| Subject: | Re: AN42B eye bolt for hinges |
Hi Kip,
The bolts will not rotate with the clevis pin going through their openings.
Hi John F,
This photo shows hinges from the original plans. Originally, they were welded but
a note says it was changed to cast aluminum. Can't find them anymore. Anyway,
a pin passes through three openings. The plans specify one side has two opening
in the hinge and the opposing side has one. I believe that would resist any
twisting force.
John C
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=495550#495550
Attachments:
http://forums.matronics.com//files/m3070009_983.jpg
Message 7
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| Subject: | Re: AN42B eye bolt for hinges |
John C.,
One advantage to using the three-eyebolt hinge is that you've got some play on
the alignment. I only used one-to-one eyebolts and it's tough to get them all
in alignment.
Best of luck on your project...
Regards,
John F.
-----Original Message-----
>From: PoconoJohn2 <redroof@protonmail.com>
>Sent: Apr 2, 2020 10:13 AM
>To: pietenpol-list@matronics.com
>Subject: Pietenpol-List: Re: AN42B eye bolt for hinges
>
>
>Hi Kip,
>
>The bolts will not rotate with the clevis pin going through their openings.
>
>Hi John F,
>
>This photo shows hinges from the original plans. Originally, they were welded
but a note says it was changed to cast aluminum. Can't find them anymore. Anyway,
a pin passes through three openings. The plans specify one side has two opening
in the hinge and the opposing side has one. I believe that would resist
any twisting force.
>
>John C
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=495550#495550
>
>
>Attachments:
>
>http://forums.matronics.com//files/m3070009_983.jpg
>
>
Message 8
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| Subject: | Re: AN42B eye bolt for hinges |
Ive been following this thread and I see the grams scale increasing rapidly with
all this pretty hardware. Has anyone done a weight comparison of eyebolts vs.welded
hinges? Glen
> On Apr 2, 2020, at 7:46 AM, Kip Gardner <kipgohio1957@gmail.com> wrote:
>
>
> I would say that will work ok as long as you do something to assure that the
eyebolts never rotate, and you do something to reduce the gap between the elevator
and the stabilizer.
>
> Kip Gardner
>
>> On Apr 2, 2020, at 10:28 AM, PoconoJohn2 <redroof@protonmail.com> wrote:
>>
>>
>> It would look like this. The photo (not sure who is building that) doesn't show
the 1/8" piece of wood which may account for the amount of "grip" area showing
on the bolt. I believe a large elastic stop nut will suffice. The washer
can't be too large since two are next to each other. I need the clevis with pin.
>>
>> John C
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=495544#495544
>>
>>
>>
>>
>> Attachments:
>>
>> http://forums.matronics.com//files/img_1030_122.jpg
>>
>>
>>
>>
>>
>>
>
>
>
>
>
Message 9
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| Subject: | Re: AN42B eye bolt for hinges |
Probably not a lot of difference. After all, four bolts are used to hold
the welded hinges. I'm happy to see the use of three eyes. The clevis
will not have side loads. I don't think there will be a binding issue
from twisting of the eyes. The clevis fit and those washers will prevent
that.
Clif
I'd like to see the gap reduced also. Even with the welded hinges I have
inset them into the wood to reduce the gap.
> <glenschweizer@yahoo.com>
>
> Ive been following this thread and I see the grams scale increasing
> rapidly with all this pretty hardware. Has anyone done a weight comparison
> of eyebolts vs.welded hinges? Glen
>
>>
>> <kipgohio1957@gmail.com>
>>
>> I would say that will work ok as long as you do something to assure that
>> the eyebolts never rotate, and you do something to reduce the gap between
>> the elevator and the stabilizer.
Message 10
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| Subject: | Re: AN42B eye bolt for hinges |
Probably not a lot of difference. After all, four bolts are used to hold
the welded hinges. I'm happy to see the use of three eyes. The clevis
will not have side loads. I don't think there will be a binding issue
from twisting of the eyes. The clevis fit and those washers will prevent
that.
Clif
I'd like to see the gap reduced also. Even with the welded hinges I have
inset them into the wood to reduce the gap.
> <glenschweizer@yahoo.com>
>
> Ive been following this thread and I see the grams scale increasing
> rapidly with all this pretty hardware. Has anyone done a weight comparison
> of eyebolts vs.welded hinges? Glen
>
>>
>> <kipgohio1957@gmail.com>
>>
>> I would say that will work ok as long as you do something to assure that
>> the eyebolts never rotate, and you do something to reduce the gap between
>> the elevator and the stabilizer.
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